Krebs & Aulich

Hydropower Generators

In the field of hydropower, Krebs & Aulich has been providing generators with permanent excitation for low and medium-pressure plants from 50 kW to 3000 kW since 2007.

These are characterized by the converter-free network parallel operation of the generator and extremely high efficiency rates even during partial load operation.


kW installed power

operating hours
Bulbsurrounded by water

Technical data

Performance range:
50 kW to 3000 kW

Lowest realized Speed:
93,75 Rpm (19 kNm and 190 kW)

Highest torque Bulb:
192 kNm (2,8 MW and 197 Rpm)

Highest torque V1:
76kNm (1,2 MW and 150 Rpm)

Guaranteed performance factor:
>0,9 cos ϕ in performance range of 25% to 125%

Level of efficiency:
Up to 98% during full-load-operation, up to 97% during 25% load operation

Beyond the ordinary

Up to 30% increased level of efficiency due to better utilization during partial load operation

Especially when retrofitting existing sites, a significant reduction in sound transmission can be achieved by avoiding an additional gear.

Because of the higher level of efficiency, higher power yields are achieved which allows a quick amortization of the higher costs with regard to the asynchronous machine.    

The movable hydropower plant with bulb generator, which was designed in collaboration with partner organizations, complies with the strictest ecological and urban development regulations.

As the powerhouse is underwater, the over- and underflow installations and the separate fish ladders, the movable hydropower plant is ideal for upgrading existing crossing structures.



Movable hydropower plants are already operating on multiple sites in Switzerland, Germany and Austria.


  • Operation in grid parallelity, no converters needed
  • Highest level of efficiency, even in partial load operation
  • Use in the low and medium voltage grid system with services of 50 kW to 3000kW
  • Rapid amortization due to very high efficiency levels in all speed ranges
  • Different housing shapes possible: Design in B3, V1 and Bulb
  • In comparison with an asynchronous machine, movable hydropower plants are lighter, smaller and operate more quietly
  • Creates useable space due to their compact design and their lack of rotor losses

Burgholz, SchweizPerformance: 150 kW, Speed: 100 u/min


HeilbronnPerformance: 900 kW, Speed: 81,1 u/min

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